Bump version to Spree 3.0.0
Bump version to Spree 3.0.0

crowdint/spree_conekta,jaime-evr/spree_conekta,conekta/spree_conekta,crowdint/spree_conekta,jaime-evr/spree_conekta,conekta/spree_conekta,jaime-evr/spree_conekta,crowdint/spree_conekta,conekta/spree_conekta